Progressive Collapse and Robustness Analysis of Multi-Story Steel Structures

Determining the damage mechanisms of structures that have suffered partial or total collapse under the influence of an earthquake contributes to revealing the causes of damage and taking the necessary precautions. Progressive collapse is a critical structural phenomenon in which local damage triggers a chain reaction, potentially leading to disproportionate failure of an entire system. In recent years, interest in multi-story steel structures has grown significantly due to their efficiency, adaptability, and performance in seismic and urban environments. This study offers a general exploration of the progressive collapse behavior of multi-story steel frames, focusing on robustness evaluation under various column removal scenarios. The aim is to enhance understanding of their structural response and support the development of safer, more resilient design strategies.